Hitch Diagnosis Following Display Condition; 4/7 Or 3/7 Of The Screen Doesn't Be Shown; Screen Doesn't Be Shown As Data Cof - Hitachi SM0063 Service Manual

2. Hitch Diagnosis Following
Display Condition
2-1. 4/7 or 3/7 of the screen doesn't be
shown
(1) Confirm the power connector of X B/D is well plugged in
which is correspond to not showing screen.
(2) Confirm the connector that is connected between CTRL
B/D and X B/D correspond to not showing part.
(3) Replace relevant X B/D.
[ [ Relationship between screen and X B/D
Screen
Left of the Screen 4/7 <-->
Right of the Screen 3/7 <-->
[ [ Screen Display Form
Left of the Screen(4/7)
Display
Not display
X B/D
Right X B/D
Left X B/D
Right of the Screen(3/7)
2-2. The screen doesn't be shown as Data
COF
(Include not be shown part of Data COF quantity or a part)
(1) The problem between Data COF and X B/D is more
possible that the screen is not be shown as data COF.
(2) Confirm the connector of Data COF is well connected to X
B/D. Correspond to the part that screen is not showing
(3) Confirm whether the Data COF is failed and replace X B/D
[ [ Example of the screen display form
(Anything of the 7 Data COF can be shown beside below
pictures)
[ [ How to examine Data COF IC
2
Resistance
Change ' 1 GND' into ANODE, '
into CATHOD and then examine the Diode to the
forward or reverse direction.
Measure the resistance value(10Ω)
- 12 -
: All
: Partial
: not at all
1 GND
2 Resistance'